Modeling of a new SMA micro-actuator for active endoscopy applications
Modeling of a new SMA micro-actuator for active endoscopy applications
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DOI：
10.1016/j.mechatronics.2008.11.010
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发表时间：
2009-06-01
期刊：
影响因子：
3.3
通讯作者：
Lexcellent, C.
中科院分区：
文献类型：
--
作者：
Abadie, J.;Chaillet, N.;Lexcellent, C.
形状记忆合金（SMA）是驱动内窥镜头的良好候选材料，但必须解决冷却问题，特别是在受限的情况下。基于这些原因，我们的实验室开发了一种专门为主动内窥镜应用而设计的新型SMA微致动器。这项工作是一个新的步骤，在使用集成热电冷却与SMA执行器的方法。事实上，在这种情况下，珀耳帖效应非常有吸引力，因为这种可逆现象减少了外部环境的过热，并提供了减少响应时间的强制冷却。本文介绍了驱动器的设计和工作原理。耦合的机械和热行为的精细建模提供了一个更好的理解的物理现象中涉及的致动器。最后，一个实验原型已经开发和测试，以验证模型的预测。(C)2008爱思唯尔有限公司保留所有权利。
Shape memory alloys (SMA) are good candidates to actuate endoscope heads but the cooling problem must be solved particularly in confined situations. For these reasons, a new SMA micro-actuator specially designed for active endoscopy applications has been developed in our laboratory. This work is a new step in the approach of using integrated thermoelectric cooling with SMA actuators. In fact, the Peltier effect is very attractive in such a case because this reversible phenomenon reduces the overheating of the external environment and provides forced cooling that decreases the response time. In this paper the actuator design and its working principle are presented. A fine modeling of the coupled mechanical and thermal behaviors gives a better understanding of the physical phenomenon involved in the actuator. Finally an experimental prototype has been developed and tested in order to verify the model predictions. (C) 2008 Elsevier Ltd. All rights reserved.